發(fā)布時間：2018-05-06 19:58

  本文選題：磷酸鹽封接玻璃 + 無鉛封接玻璃��； 參考：《濟南大學(xué)》2016年碩士論文

【摘要】：真空平板玻璃是近年來興起的一種節(jié)能型透明、保溫、隔熱材料,在保溫箱柜、建筑物及車、船門窗等方面應(yīng)用前景廣闊。真空平板玻璃是兩片玻璃板在真空加熱爐中經(jīng)過一次封接制成的。低熔點且熱膨脹系數(shù)與玻璃板相匹配的封接焊料是制備真空玻璃的重要材料。磷酸鹽系統(tǒng)封接玻璃的熔封溫度低,熱膨脹系數(shù)范圍較寬,可滿足真空平板玻璃封接低溫化的需求,更符合封接焊料無鉛化的發(fā)展趨勢。實驗首先在設(shè)計和制備了(Na_2O-CaO-SiO_2)-P_2O_5系統(tǒng)玻璃的基礎(chǔ)上,探究了P_2O_5含量以及添加B_2O_3和ZnO、Fe_2O_3、ZrOCl_2后玻璃樣品結(jié)構(gòu)與性能的變化規(guī)律,以尋找符合真空平板玻璃封接要求的最佳玻璃組成。研究表明在(Na_2O-CaO-SiO_2)-P_2O_5系統(tǒng)玻璃中,玻璃的密度隨著P_2O_5摩爾含量的增加而增大,進一步減少SiO_2含量時,玻璃化學(xué)穩(wěn)定性提高,但總體上仍然較差。添加不同摩爾比的B_2O_3和ZnO系列玻璃的密度、熱膨脹系數(shù)隨著B_2O_3/ZnO摩爾比的增大而減小,而玻璃轉(zhuǎn)變溫度和膨脹軟化溫度則升高,玻璃化學(xué)穩(wěn)定性在B_2O_3/ZnO摩爾比為1/3時最佳,但依然較差,且玻璃粉末試樣受熱變化的特征溫度逐漸升高,封接溫度高于600oC,不可用于平板玻璃封接。隨著Fe_2O_3對B_2O_3取代量的增加,玻璃的密度增大,而玻璃顆粒經(jīng)沸水浴后質(zhì)量損失減小,化學(xué)穩(wěn)定性提高,熱膨脹系數(shù)逐漸減小,玻璃轉(zhuǎn)變溫度和膨脹軟化溫度則是先降低后升高,均在Fe_2O_3對B_2O_3替代量為5mol%時最小,分別為402oC和450oC,玻璃粉末試樣受熱變化的特征溫度逐漸降低,封接溫度降至500oC以下。Fe_2O_3替代ZnO系列玻璃的密度、玻璃轉(zhuǎn)變溫度Tg及膨脹軟化溫度Tf隨著Fe_2O_3對ZnO替代量的增加而增大,玻璃化學(xué)穩(wěn)定性提高。玻璃最佳組成為:10(R2O+RO)-24.4(Al2O3+SiO_2+ZnO)-54P_2O_5-11.6Fe_2O_3。該玻璃的密度為2.93g/cm3,玻璃顆粒經(jīng)沸水浴的質(zhì)量損失為0.69%,熱膨脹系數(shù)為8.61×10-6/oC,膨脹軟化溫度為465oC,封接溫度范圍為395oC~490oC。向玻璃中引入ZrOCl_2,玻璃顆粒經(jīng)沸水浴后質(zhì)量損失進一步減小,而玻璃的熱性能參數(shù)和受熱變化的特征溫度變化不大。在ZrOCl_2添加量為2mol%時,玻璃化學(xué)穩(wěn)定性最好,沸水浴后質(zhì)量損失僅為0.22%,該玻璃的密度為2.96g/cm3,熱膨脹系數(shù)為8.56×10-6/oC,膨脹軟化溫度為459oC,封接溫度范圍為390oC~483oC,可用于真空玻璃封接。研究結(jié)果表明,添加B_2O_3和ZnO總體使封接玻璃的性能變差,添加Fe_2O_3和ZrOCl_2總體改善了封接玻璃的性能。
[Abstract]:Vacuum flat glass is a kind of energy saving transparent, thermal insulation material, which has a broad application prospect in the field of heat preservation cabinet, building, vehicle, ship door and window and so on. Vacuum plate glass is made of two glass plates sealed in a vacuum heating furnace. Sealing solder with low melting point and matching coefficient of thermal expansion with glass plate is an important material for preparing vacuum glass. The sealing temperature of phosphate system is low and the coefficient of thermal expansion is wide. It can meet the needs of vacuum plate glass sealing at low temperature and accord with the development trend of lead-free sealing solder. On the basis of the design and preparation of NaSZ _ 2O-CaO-SiO _ 2O _ 2- P _ 2O _ 5 system glass, the changes of the structure and properties of the glass samples after the addition of B_2O_3 and ZnO-Fe _ 2O _ 3i _ 2O _ 3-ZrO _ Cl _ Cl _ 2 are studied in order to find the best glass composition which meets the requirements of vacuum plate glass sealing. The results show that the density of the glass increases with the increase of the molar content of P_2O_5 and the chemical stability of the glass increases when the content of SiO_2 is further reduced, but on the whole, the chemical stability of the glass is still poor in the case of Na2O-CaO-SiO _ 2C _ 2C _ 2O _ 5 system glass. The thermal expansion coefficient of B_2O_3 and ZnO series glasses with different molar ratio decreases with the increase of B_2O_3/ZnO molar ratio, while the glass transition temperature and swelling softening temperature increase. The chemical stability of glass is the best when the molar ratio of B_2O_3/ZnO is 1 / 3. But it is still poor, and the characteristic temperature of the change of glass powder under heating is rising gradually, and the sealing temperature is higher than 600oC, so it can not be used for plate glass sealing. With the increase of B_2O_3 substitution by Fe_2O_3, the density of glass increases, while the mass loss of glass particles decreases after boiling water bath, the chemical stability increases, the thermal expansion coefficient decreases gradually, and the glass transition temperature and swelling softening temperature decrease first and then increase. When the substitution amount of Fe_2O_3 for B_2O_3 is 5 mol%, 402oC and 450 OC, respectively, the characteristic temperature of the thermal change of glass powder samples decreases gradually, and the sealing temperature drops to the density of ZnO series glasses replaced by FeStat _ 2O _ 3 below 500oC. The glass transition temperature (TG) and the swelling softening temperature (TF) increase with the increase of the substitution amount of Fe_2O_3 for ZnO, and the chemical stability of the glass increases. The optimum composition of the glass is as follows: 1: 10 R2O RO)-24.4(Al2O3 SiO_2 ZnO- 54P\\\ {\}\\\ {\}\ {\}\ {\}\? The density of the glass is 2.93 g / cm ~ (-3). The mass loss of the glass particles through boiling water bath is 0.69, the coefficient of thermal expansion is 8.61 脳 10 ~ (-6) / oC, the swelling softening temperature is 465oC, and the sealing temperature is 395oC _ (490oC). When ZrOCl2 was introduced into the glass, the mass loss of glass particles decreased further after boiling water bath, but the thermal properties of glass and the characteristic temperature of heating change were not changed much. When the content of ZrOCl_2 is 2 mol%, the chemical stability of the glass is the best, the mass loss after boiling water bath is only 0.22. The density of the glass is 2.96 g / cm ~ (-3), the coefficient of thermal expansion is 8.56 脳 10-6 / oC, the swelling softening temperature is 459 OC, and the sealing temperature is 390oC ~ (483oC), which can be used for vacuum glass sealing. The results show that the properties of the sealant glass become worse with the addition of B_2O_3 and ZnO, and the properties of the sealing glass are improved with the addition of Fe_2O_3 and ZrOCl_2.
【學(xué)位授予單位】：濟南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TQ171.1

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